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Anthropic: Claude 4.1 Opus

claude-opus-4.1

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Claude 4.1 Opus costs $19.50 per million input tokens and $97.50 per million output tokens, supports 200K context, and is available through the OpenAI-compatible API.

Claude Opus 4.1 is a powerful model from Anthropic that delivers sustained performance for complex coding and other long-running tasks that require thousands of steps, expanding the capabilities of AI agents.

Modalities

Text + Image → Text

Input / output price

$19.50 / $97.50 per 1M

Context

200K · max output 32K

Capabilities

VisionTool calling

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$19.50
Output$97.50
Cached input$1.95

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.1365
Per day
$68.25
Per month (30 days)
$2047.50

Claude 4.1 Opus: input $19.5/M · output $97.5/M · cached input $1.95/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-opus-4.1", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to claude-opus-4.1.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-4.1",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is Claude 4.1 Opus billed?
Input is $19.50 and output is $97.50 per million tokens; cached input is $1.95. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
200K tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
Claude 4.1 Opus API pricing · GeniusRelay